I need help bad..or I may kill myself?

I am a very outgoing person once you get to know me. My friends love me. But under all that I have horrible self esteem. People call me cute and beautiful but for some reason I can't stop obsessing about how boys rate me. Boys tell me I'm cute and try to get with me. also I have a boyfriend. But my confidence is so low that if I'm sitting in front of a group of people expecially bpys I can't seem to get the nerve to hold my head up. I can't be myself. But I am not quiet. I also get intimidated and uncomfortable easily. It's just consuming my life an if I don't get help then who knows. So please..people you can make a difference if you answerr.